1Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN, United States, 2Radiology, Center for Magnetic Resonance Research, Minneapolis, MN, United States

Slots are introduced to the standard microstrip transmission line RF coil
element, to enhance the current density and obtain better improved transmit
efficiency. A prototype of such a
slotted microstrip element is compared with the standard microstrip element at
297.25 MHz for 7T MR scanner to show the feasibility of the design at higher
magnetic fields. A 60% improvement in
the transmit efficiency and increased penetration of field into the phantom are
observed experimentally. The B1+ field distribution in
both transverse and sagittal plane are shown for the comparison.

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